Schedule I - Condensed Statements of Comprehensive (Loss) Income (Detail) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2016	[1]	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	[2]	Dec. 31, 2015	[3]	Sep. 30, 2015	Jun. 30, 2015	[4]	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Net (loss) income	$ (11,905)		$ 65,655	$ 17,768	$ (84,049)		$ (11,028)		$ 97,950	$ 5,809		$ (43,598)	$ (12,531)	$ 49,133	$ 49,919
Comprehensive (loss) income													(13,088)	36,479	49,425
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Equity in net (loss) income of subsidiary													(12,531)	49,133	49,919
Net (loss) income													(12,531)	49,133	49,919
Comprehensive (loss) income													$ (12,531)	$ 49,133	$ 49,919

[1] During the fourth quarter of 2016, the Company recorded $8,904 in restructuring and other related costs primarily related to severance costs and other employment expenses. See Note 4–Restructuring Programs and Separation Costs for further details.

[2] During the first quarter of 2016, the Company recorded $27,516 in equity compensation expense related to certain of the Company’s performance-vesting restricted shares (the “2.25x Performance Restricted shares”) which became probable of vesting during the first quarter and vested on April 1, 2016. See Note 18–Equity-Based Compensation for further details.

[3] During the fourth quarter of 2015, the Company recorded $2,001 in restructuring and other related costs primarily related to severance costs for certain positions which were eliminated as part of a cost savings initiative. See Note 4–Restructuring Programs and Separation Costs for further details.

[4] During the second quarter of 2015, the Company recorded $20,348 in loss on early extinguishment of debt and write-off of discounts and debt issuance costs related to the early redemption of $260,000 of its then existing Senior Notes. See Note 11–Long-Term Debt for further details.